01475nam a2200193Ia 4500001088000000002005100880008003700931010001100968530002200979650003101001650002501032650002601057650002401083650002901107650002501136700003601161700003501197700004901232IA_Ethanol production from pineapple waste juice batch fermentation (Ananas comosus L.) by the bacteria Zymomonas mobilis with and without controlling pH, and by the yeast Saccharomyces cerevisiae without controlling pH was studied. Respose variables were ethanol (%), total sugars (%), titratable acidity (%) and pH. A randomized complete design was used. Highest ethanol production was obtained by Z. mobilis without controlling pH (6.3 %), comparing with Z. mobilis with controlling pH (4.92%) and with S. cerevisiae without controlling pH (5.41%). Optimum conditions to produce ethanol with Z. mobilis were: temperature 30ºC, approximately 11% total sugars, about 0.3% titratable acidity and pH of about 5.5. The optimum conditions to produce ethanol from S. cerevisiae were: temperature 30ºC, about 10% total sugar, approximately 1% titratable acidity and pH of about 3.4.ETANOL A PARTIR DE LA  FERMENTACION DE JUGO DE DES220117s    xx            000 0 und d  a184036  aDisponible en PDF  aDesechosxFermentación    aEthanol production    aPineapplesx Wastes    aPiñasxDesechos    aProducción de etanol    aWastesxFermentation  aEsparza Torres, Félix, asesor  aGómez Cruz, Adalberto, dir.   aGoytia Jiménez, María Antonieta, asesor